I stuck on message passing in my Google Chrome extension.
I have this popup.js:
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
if (request.do == 'popup_refreshMessage')
jQuery('#message').html(request.message);
}
);
jQuery('input[type=button]').click(function(){
chrome.runtime.sendMessage({
do: "background_start"
});
});
and this popup.html:
<html>
<body>
Message:
<div id="message"></div>
<input type="button" value="Start">
</body>
</html>
Now, I want background page to periodicly refresh message in my popup. So, background.js look like this:
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
if (request.do == 'background_start') {
var periodicFunc = function() {
request.callback({
do: "popup_refreshMessage",
message: Math.random()
});
setTimeout(myFunc, 1000);
}
periodicFunc();
}
});
But when I click button, nothing happen and "Uncaught TypeError: Cannot call method 'addListener' of undefined" appear in console.
How can I write background page to periodicly update HTML in my popup? Thank you.
